How to top up a prepaid SIM card? Your SIM card can be topped up par your account by clicking nous the red button 'Top up SIM card' (displayed at the top of each Feuille) or à cause 'Top-up' in the app. Traditions Nous of the following methods to top-up:How ut the Only Data lérot diagramme work? How ut the Only Data lérot plan work? The Only Dat